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<a name="MIPS-SIMD-Architecture-_0028MSA_0029-Support"></a>
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<hr>
<a name="MIPS-SIMD-Architecture-_0028MSA_0029-Support-1"></a>
<h4 class="subsection">6.60.18 MIPS SIMD Architecture (MSA) Support</h4>

<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top">&bull; <a href="MIPS-SIMD-Architecture-Built_002din-Functions.html#MIPS-SIMD-Architecture-Built_002din-Functions" accesskey="1">MIPS SIMD Architecture Built-in Functions</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
</table>

<p>GCC provides intrinsics to access the SIMD instructions provided by the
MSA MIPS SIMD Architecture.  The interface is made available by including
<code>&lt;msa.h&gt;</code> and using <samp>-mmsa -mhard-float -mfp64 -mnan=2008</samp>.
For each <code>__builtin_msa_*</code>, there is a shortened name of the intrinsic,
<code>__msa_*</code>.
</p>
<p>MSA implements 128-bit wide vector registers, operating on 8-, 16-, 32- and
64-bit integer, 16- and 32-bit fixed-point, or 32- and 64-bit floating point
data elements.  The following vectors typedefs are included in <code>msa.h</code>:
</p><ul>
<li> <code>v16i8</code>, a vector of sixteen signed 8-bit integers;
</li><li> <code>v16u8</code>, a vector of sixteen unsigned 8-bit integers;
</li><li> <code>v8i16</code>, a vector of eight signed 16-bit integers;
</li><li> <code>v8u16</code>, a vector of eight unsigned 16-bit integers;
</li><li> <code>v4i32</code>, a vector of four signed 32-bit integers;
</li><li> <code>v4u32</code>, a vector of four unsigned 32-bit integers;
</li><li> <code>v2i64</code>, a vector of two signed 64-bit integers;
</li><li> <code>v2u64</code>, a vector of two unsigned 64-bit integers;
</li><li> <code>v4f32</code>, a vector of four 32-bit floats;
</li><li> <code>v2f64</code>, a vector of two 64-bit doubles.
</li></ul>

<p>Instructions and corresponding built-ins may have additional restrictions and/or
input/output values manipulated:
</p><ul>
<li> <code>imm0_1</code>, an integer literal in range 0 to 1;
</li><li> <code>imm0_3</code>, an integer literal in range 0 to 3;
</li><li> <code>imm0_7</code>, an integer literal in range 0 to 7;
</li><li> <code>imm0_15</code>, an integer literal in range 0 to 15;
</li><li> <code>imm0_31</code>, an integer literal in range 0 to 31;
</li><li> <code>imm0_63</code>, an integer literal in range 0 to 63;
</li><li> <code>imm0_255</code>, an integer literal in range 0 to 255;
</li><li> <code>imm_n16_15</code>, an integer literal in range -16 to 15;
</li><li> <code>imm_n512_511</code>, an integer literal in range -512 to 511;
</li><li> <code>imm_n1024_1022</code>, an integer literal in range -512 to 511 left
shifted by 1 bit, i.e., -1024, -1022, &hellip;, 1020, 1022;
</li><li> <code>imm_n2048_2044</code>, an integer literal in range -512 to 511 left
shifted by 2 bits, i.e., -2048, -2044, &hellip;, 2040, 2044;
</li><li> <code>imm_n4096_4088</code>, an integer literal in range -512 to 511 left
shifted by 3 bits, i.e., -4096, -4088, &hellip;, 4080, 4088;
</li><li> <code>imm1_4</code>, an integer literal in range 1 to 4;
</li><li> <code>i32, i64, u32, u64, f32, f64</code>, defined as follows:
</li></ul>

<div class="smallexample">
<pre class="smallexample">{
typedef int i32;
#if __LONG_MAX__ == __LONG_LONG_MAX__
typedef long i64;
#else
typedef long long i64;
#endif

typedef unsigned int u32;
#if __LONG_MAX__ == __LONG_LONG_MAX__
typedef unsigned long u64;
#else
typedef unsigned long long u64;
#endif

typedef double f64;
typedef float f32;
}
</pre></div>

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